The idea that children - or anyone else for that matter - are supposed to find gods real and Santa false is preposterous. There is every bit as much evidence to support the most incredible version of the Santa myth (i.e., that he flies around with magic reindeer delivering gifts to every home not afflicted with poverty in the United States and other countries where he is celebrated in one night, etc.) as there is for the various gods that have been worshiped through the ages. Let's stop pretending that any of this stuff is real.
For several other Christmas-related posts, check out the Atheist Revolution Christmas collection.